Serenity

The Serenity field was discovered by well 13/23c-10, drilled by i3 (100% WI) in late 2019. The well encountered a 20ft thick oil-bearing sand (11ft true vertical thickeness, TVT) unit at the top of the Lower Cretaceous Captain sequence. The reservoir quality was high, with porosities averaging 24.5% and oil samples, recovered by wireline, having an API of 31.5°, suggesting that they are very similar to the oil in the neighbouring Tain and Blake fields. The Serenity reservoir is a pinch-out of the Captain sands against the southern margin of the Halibut Horst, analogous to the Tain and Blake Flank. The sand is 11ft thick (TVT) at the 13/23c-10 well.

The maximum expected oil column in the Serenity field is 1124ft true vertical depth (TVD), from the highest known oil in Tain to the Blake-Liberator-Serenity common oil water contact (OWC). This matches i3’s pre-drill predictions and is supported by well 13/23c-10 pressure measurements.

Serenity Seismic Line — Serenity Discovery – Seismic Depth Line Through 13/23c-10 Well and Tain Discovery (tvdss ft)

The Blake, Tain and Serenity fields share a common reservoir and OWC. Their depositional history and reservoir charge have been modelled by i3. The model has been confirmed by the pressure and fluid composition data from the 12/23c-10 well.

In September 2022, i3 and EOG drilled an appraisal well towards the centre of the Serenity area hoping to find thicker oil bearing sands somewhat downdip from the discovery well. Unfortunately, whilst thicker sands were encountered, they were water bearing and not in direct communication with the oil bearing sand in the discovery well. The field has subsequently been re-mapped to reflect the oil bearing reservoir sand pinching out to the West of the discovery well.

Serenity Discovery Depth Map — Serenity Discovery – Depth map showing mapped closure of Serenity reservoir sands tvdss (post 12/23c-12)